Serene Sling is made from a resilient knit fabric that is soft and flexible, but won't stretch out with repeated use and washing. You'll love how the wide shoulder strap distributes baby's weight, and baby will love staying close to you! The one piece design makes the sling super easy to use, whether you're active around the house, out shopping, or on a long trip. With multiple colors and patterns to choose from, you're sure to find one that fits your unique style. All the material are ecologically manufactured without the use of harmful substances and Oeko-tex certified. Made in Japan.